<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator="/">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片区域 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
			<el-table :data="rolesList" border stripe>
				<!--展开列-->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeById(scope.row, item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二、三级权限 -->
							<el-col :span="19">
								<!--通过for循环，嵌套渲染二级权限-->
								<el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeById(scope.row, item2.id)">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeById(scope.row, item3.id)">
											{{item3.authName}}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!--索引列-->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="290px">
					<template slot-scope="scope">
						<el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<el-button type="danger" size="mini" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
						<el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRolesDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>

		<!-- 添加角色对话框 -->
		<el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
			<!--内容主题区域-->
			<el-form :model="addForm" :rules="addFormRules" label-width="80px" ref="addFormRef">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!--底部区域-->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRoles">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 编辑角色对话框 -->
		<el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<el-form :model="editForm" :rules="editFormRules" label-width="80px" ref="editFormRef">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="editForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editRolesInfo">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 分配权限的对话框 -->
		<el-dialog title="分配权限" :visible.sync="setRightsdialogVisible" width="50%" @close="setRightDialogClosed">
			<!-- 树形控件 -->
			<el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all 
			:default-checked-keys="defKeys" ref="treeRef"></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRolesdialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="allotRights">确 定</el-button>
			</span>
		</el-dialog>
	
	</div>
</template>

<script>
	export default {
		data() {
			return {
				rolesList: [],
				//添加按钮对话框
				addDialogVisible: false,
				//添加角色的表单数据
				addForm: {
					roleName: '',
					roleDesc: ''
				},
				addFormRules: {
					roleName: [{
						required: true,
						message: '请输入角色名称',
						trigger: 'blur'
					}]
				},
				//编辑角色的对话框
				editDialogVisible: false,
				//查询到的角色信息对象
				editForm: {},
				//编辑角色表单数据规则
				editFormRules: {
					roleName: [{
						required: true,
						message: '请输入角色名称',
						trigger: 'blur'
					}]
				},
				//控制权限框的显示与隐藏
				setRightsdialogVisible: false,
				//所有权限数据
				rightsList: [],
				//树形控件的属性绑定对象
				treeProps: {
					label: 'authName',
					children: 'children'
				},
				//默认选择的id值数组
				defKeys: [], 
				//当前即将分配权限的角色id
				roleId: ''

			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			//获取角色列表
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status != 200) {
					return this.$message.error("获取角色列表失败！")
				}

				this.rolesList = res.data
			},
			//监听添加角色对话框事件
			addDialogClosed() {
				this.$refs.addFormRef.resetFields()
			},
			//添加角色
			addRoles() {
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return
					//可以发起添加角色的网络请求
					const {
						data: res
					} = await this.$http.post('roles', this.addForm)
					if (res.meta.status != 201) {
						return this.$message.error("添加角色失败！")
					}
					//成功！
					this.$message.success("添加角色成功！")
					//关闭界面
					this.addDialogVisible = false
					//更新列表
					this.getRolesList()
				})
			},
			//展示编辑角色的对话框
			async showEditDialog(id) {
				const {
					data: res
				} = await this.$http.get('roles/' + id)
				if (res.meta.status != 200) {
					return this.$message.error("获取角色信息失败！")
				}
				this.editForm = res.data
				this.editDialogVisible = true
			},
			////监听修改用户对话框的关闭事件
			editDialogClosed() {
				this.$refs.editFormRef.resetFields()
			},
			//修改
			editRolesInfo() {
				this.$refs.editFormRef.validate(async valid => {
					if (!valid) return
					//发起修改角色的请求
					const {
						data: res
					} = await this.$http.put('roles/' + this.editForm.roleId, {
						roleName: this.editForm.roleName,
						roleDesc: this.editForm.roleDesc
					})
					if (res.meta.status != 200) {
						return this.$message.error("更新角色失败！")
					}
					this.editDialogVisible = false

					this.getRolesList()

					return this.$message.success("更新角色成功！")
				})
			},
			//删除操作
			async removeRolesById(id) {
				//弹窗询问是否删除
				const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				//确定返回confirm，取消返回cancel
				if (confirmResult != 'confirm') {
					return this.$message.info("已取消删除")
				}

				const {
					data: res
				} = await this.$http.delete('roles/' + id)
				if (res.meta.status != 200) {
					return this.$message.error("删除角色失败！")
				}
				this.$message.success("删除角色成功！")
				this.getRolesList()
			},
			//弹框提示权限是否删除
			async removeById(role, rightId) {
				const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				//确定返回confirm，取消返回cancel
				if (confirmResult != 'confirm') {
					return this.$message.info("已取消删除")
				}

				const {
					data: res
				} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
				if (res.meta.status != 200) {
					return this.$message.error("删除权限失败！")
				}
				//this.getRolesList()
				role.children = res.data
			},
			//展示分配权限的对话框
			async showSetRolesDialog(role) {
				this.roleId = role.id
				const{data: res} = await this.$http.get('rights/tree')
				if(res.meta.status != 200){
					return this.$message.error("获取权限数据失败！")
				}
				//获取到的权限数据
				this.rightsList = res.data
				console.log(this.rightsList)
				//通过递归获取三级权限
				this.getLeafKeys(role, this.defKeys)
				
				this.setRightsdialogVisible = true
			},
			//通过递归的形式，获取角色下所有三级权限的id，并保存在 defKeys 数组中
			getLeafKeys(node, arr) {
				//如果当前节点不包含children属性，则是三级节点
				if(!node.children){
					return arr.push(node.id)
				}
				
				node.children.forEach(item =>
				this.getLeafKeys(item, arr))
			},
			//监听分配权限对话框的关闭事件
			setRightDialogClosed() {
				this.defKeys = []
			},
			//点击为角色分配权限
			async allotRights() {
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				const idStr = keys.join(',')
				
				const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, 
				{rids: idStr})
				if(res.meta.status != 200){
					return this.$message.error("分配权限失败！")
				}
				
				this.$message.success("分配权限成功！")
				this.getRolesList()
				this.setRightsdialogVisible = false
			}
		}
	}
</script>

<style lang="less" scoped>
	.el-tag {
		margin: 7px;
	}

	.bdtop {
		border-top: 1px solid #eee;
	}

	.bdbottom {
		border-bottom: 1px solid #eee;
	}

	.vcenter {
		display: flex;
		align-items: center;
	}

	.el-row {
		display: flex;
		align-items: center;
	}
</style>
